Our brightening mouthwash contains xylitol, peppermint oil and glycerin. It can penetrate deep into the enamel and break down the pigment deposited on the teeth, making the teeth white from the inside out. Its use method is very simple: 1. Rotate the bottle cap to open the product; 2. Pour it into your mouth and start gargling. 3. Gargle for 1 minute, then spit it out; 4. Use twice a day for 7 consecutive days for better results. Whitening mouthwash completely whitens teeth, relieves bad breath, lasts freshness, and protects gums and teeth.